Police and Secret Service agents questioned the man and took him into custody when it was discovered he did not have a driver’s license.

As the vehicle was being towed from the parking lot, police officers found a knife "concealed in the car," McAndrew said.

The man, identified as 24-year-old Davit Zakaryan of Cincinnati, Ohio, faces a weapons charge because the knife exceeded eight inches. There is no word why he was outside Obama’s hotel or why he was in the Ottumwa area.